Mine-car braking mechanism



. A 1,644,474 Oc J. A. HEBB MINE CAR BRAKING MECHANISM Filed May 19. 1926 Patented Get. 4, 1927.

JoHN H'EBB, or norwoon, PENNSYLVANIA;

MINECAR BRAKING-MECHANISM.

Application filed May 19-,

My invention consists of- :an improvement in mine cars, and particularly in the braking. mechanism therefor.

It has in view to provide means for bra-king'the carfrom either end {so as-toavoid the necessity: of standingvon the front end of a car with the attendant'risks. Iv

Ordinarily, mine car brakes are; operated through levers,- cranks,- and rigid-pitmen,;so that if a brakingv lever is mounted-at either end of a car and-connected with thezbrake' shoe mechanism, operation of either lever will transmit undesired movement to the other; resulting in jamming'or strainingof the parts or the necessity or releasing be foreactionb My invention obviates all such objections, and renders it possible to operate" the brakes from either endyor at either side ofeither end of thecar, without disturbing the other operative lever or levers.

I have shown the operating 'l'evers' at each end portion of the car and at opposite sides thereof, connected to one or the other of two side levers which are capable ofr operation from either end; and each of which "is mounted on a common cross' rock" shaft,

whereby both of said levers operate together when either is' actuated, infefle'cting simultaneous movement of the'brake shoes, at op-- posites'ides;

The present invention is animprovement 7 o'n'th'e general type of construction shown in prior Patent- No.21,5O8,971f granted to WilliamJ. McDade and myselfi september l6,

' one ofthe side levers:

Referring-to the drawings gisthe bodyof thecar of us'ua'l design, mounted onwheels 3 and provided jwith a-brake shoe-4 ateach sideofwellknownforml 1 e 'Sa-id shoes are mounted" for vertical "ad justment' toward 7 from the wheels; 3 by straps 5 whichembracethe brake shoe'siand are'corrnec'ted' therewith byitransverse bolts 6' or any other suitableway'. A guiding extension 7 of: each strap member, for each brake? sl me, egtends upwardly" through a:

- Witheitherlapplication, byrei-ther -lever 13" I I 1926. Serial 1%.. 110,063.

guiding bracket 8 secured to each opposite side of the car body,--as in; Figs. 1 and-f2 By such arrangement, with straps 5 mounted in a guidingPslotof each bracke t,. each brake shoe maybe maintained centrally between the wheels 3+3 so as to insure quick.

and even application of braking power, upon lowering the shoes, with equal simultaneous separatlon on raising.-

For the purpose of operating the shoes together; either downwardly -fo'r braking f or upwardly 'for rel'ease, I p-rovidea pair of lever-s9 secured tothe' oppositeends of a transverse rock shaft-'10; mounted ill suitable bearings across underneath; the body of l the car. Each lever 9 is provided with an outer laterall-ifting terminal 11 and an upwardly extending lever .arnr 12, by whichisimilar movement may be} imparted to the lever, either by raising'ren d 11-, 'orbypullingend 12 inthe opposite direction?lengthwise;

. For such purpose, a pair of levers lfi are pivoted; at 14 ateach 0pposite side-of one, end-of the car," in suitable guides 15. Said levers are connected by their bell GIaILkEX- tensions 16-;and chain sections 17, with: the l ends 11 of levers9, Sothatwhen'either lever 13' is thrust, baokvvardly toward the; end of the car, as at the left hand end OfFlg i glytlle long? arm terminal-11 of: corresponding" lever 9 will beraisedfl. m 7., l jj :l' Likewise; the lever extension l2aisleon nect'ed by rodlS: and chain section 19-- ,with; an ordinary j'straight lever 20 pivoted ;at' 21;

one-ateach opposite side ofatheothef of V llh BICZlI' 4- 1- Wh'en either lever 20is' drawn toward the end; similar movementwil'libe' imparted to one or the other arm'12 of lever 9, in the 7 same manner'describedp Levers 9 jare' operatively connected with the: brakeishoesl and their straps 5,Lby: a

slotted arm 22 'engagi ngi stud: 23 as shown in or 20,; and with levers-9 keyed to-i'theroek shaft a similar rocking movement":will-be imparted-toi erossrock?shaft lfitwith a' cor s rlioondingr downward vthrust"fo'ti botlii arins e 3 9 the brake shoes'iaway. fKOIil iGOIlfitICQf such nio tioi r being; byl-the slack Qhatifi Section l7i or i I e V j d}; rhep emtor' may apply braking "jactionto'fthe wheels while standing at theif rear ofthe carfandoperating the lever 13 c i for'20. at"either side, W th P Safety and several wheels. 7 v

' The construction is very simple, cheap and efiective', andiprovides a safe, powerful and directly acting'equipment; 1 a iIt-may be applied'to other than mine cars; "I 'an'd maybe changediorvaried from in differ i a rent detai -llby the skilled mechanic, but" all ,7 g I, i such-changes are to considered T aswithin the scope'ofthe'following"claims;

LWhat'Ifclainiisr "1 I V jrlL Thecombination with-a mine car hav- '1 ing" wheels thereon, ofa braking mechanism r2 -fable-ishoes"adapte to be movedfi'nto wheel iiengaging-iposition, a transverserock shaft, a pairfofilevers secured to said rock, shaft each .le'vr' at' di'agonally opposite cornerportions 'of the' car, {and means -"fl exibly connecting each of saiddiagonally located ilevers with; V I

operating leverhaving pin and slot connec-f tion 'with the brake shoe and variably eX-' oneoftherockishaft levers. j i i 25 The combinationwithi a' 'mine car' hav ing wheelsfjthereon, of a braking mechanism able shoes adapted 'ltoi bemoved into? wheel i 'operatively connectedwithoneshoe'and each provided with two independently operating L -tensionfconnections, and oppositely loc ted hand lever'siconne'cted levers by'said Connections} i45 operatively connected'with one shoe bg in sand sloth-connection, =and a lever ateac end thereforconiprisingfa pair of vertically mov bleisshoes adapted to be 4 moved 7 into wheel H ni wnn'ected jeithig id levers." oil 7 mg 1 r n, of 1a., braln'ng mechanis engaging. position; awtransverse :rock shaft,

7 ma 1 operatively oo nnected; "with: lone shoe was an madam e-iletmllyfer i -ample power, equally distributed through the thereforcomprisin a pair of fvert-ically mov-' operativel yrconnected with one shoe, a hand t thereforcomprising a-p'air'of vertically mov engagin position, a transverse rock; shaft, a pa r of evers -s'ecured' t'o sald rock shaft each Q Y 3.} The combination with a mine car have ,iingjwheels thereon, of a braking mechanism air: of levers secured to said r00 shafte'ach o fithe car-flexiblyconnected with one of said able shoes each-adapted to be moved" into wheel, engaging 'positionbetwee'n the wheels at opposite sides,atransverse rock shaft, a pair of levers securedto opposite. endpor tions of saidrock shaft each operativelyv connected, with lone of said shoes, and an actuating hand levermounted on the sideiof V :the'car and-connected to one ofsaid'levers. v 1 p 1 1-; ,Theco-mbination-with a mine carh'av- 1 -1ng wheels-thereon, of-a braking-mechanism therefor comprising a pair of vertically'movk g j V combination with amine,ear'hav lngwheels thereon, of. a braking mechanism 1 engaging position,a transverse rockshafaa j pairoflevers securedtt'osaidrock shaft each, operiitiv'ely' connected-,gfwith' one v shoe, 1 and. T leversi'atyeac-h" side 0f. teach endsef thef 'ca 6 rising alpair of vertically mov-i ableishgessa aptedfto {be moved Jinto wheel iiylof;'leverstsecured' said r'ock' shaft tending arm, and actuating hand levers therefor mounted on the car and flexibly connected to said'arms; I 7' 6. In a mine car, a vertically movable brake shoe mounted for verticalmove'ment between two adjacent wheels having a holdj ing strap provided with a stud, a rock shaft, V

and an op'erating'lever secured'thereto hav 'ing a plurality of divergently disposedcon- I necting arms for independent connection "3 with independently operative hand levers. 7. In a mine car, a vertically movable brake shoe mounted for vertical movement arms, and aplu rality of'independently 'operative hand levers on the car, one ofsaid said'armsl levers beingflexibly connected with eachof 8; In amine car, a" vertically :mova-ble brake shoe: mounted: for vertical movement betweentwo adjacent wheels havinga hold- -V ing strap provided with a stud and a guiding extension, a guide therefor, a rock shaft, an

tendingarms, and a. hand leverv ateach end .po'rtionf of the car' flexibly. connected with .one'of'said'arms."

9. The combinatlon with a mine car havmg wheels thereon, ofa brak ng mechanism therefor comprising a pair-of vertically V movableashoes eachadapted to be moved into wheel engaging .position' between the wheels at oppositesidesatransverse rocksh'aft,a i I pair ofleversgsecuredto oppositeend portions of said rock shaft each operativelycon- 1 nected with one of said shoes and, each'having plura'l power applying arms, and individual i actuating, hand levers tlferefor therefor comprisingapair of vertically mov -i able shoes each adaptedftobe moved into wheelengaging position between the wheels at opposite sides," atransverserock shaft, a pair of --levers secured to, opposite end poretio'nsf of said; roc'ki'shaft each operatively c connected with lone of'said shoes, and an actuating fhand lever at: diagonally} opposite 1,644,474 r v I 8 corner portions of the car connected to one t-ions of said rock shaft each operatively 10 of said levers. I I connected With one of said shoes, and an 12. The combination With a mine car havactuating hand lever at each corner portion ing Wheels thereon, of a braking mechanism of the car flexibly connected With one of said therefor comprising a pair of vertically mov arms. v able shoes each adapted to be moved into 7 In testimony whereof I hereunto'aifix my 15 wheel engaging position between the Wheels signature.-

at opposite sldes, atra-nsverse rock shaft, a

pair of levers secured to opposite end porv 7 JOHN A, HEBB. 

